Evaporation capacity: 5.4t/h
Evaporation process: MVR forced circulation tubular evaporation system
Treatment object: sodium chloride wastewater
Final concentration: Crystallization
Main material: TA2 (titanium alloy)
Project Background
A certain chemical unit in Suqian, Jiangsu Province, has produced a large amount of wastewater containing sodium chloride during its production process. This type of wastewater is highly saline and corrosive. Traditional treatment methods are energy-intensive and inefficient, making it difficult to meet modern environmental protection requirements. To achieve efficient
Wastewater treatment and resource recovery, while reducing operating costs, the company has introduced the MVR forced circulation tubular evaporation system and selected TA2 titanium alloy as the main material to ensure the corrosion resistance and operational stability of the equipment.
Process flow
• Pretreatment: Sodium chloride wastewater first undergoes pretreatment to remove suspended solids, large particle impurities and some organic matter, and adjust the pH value to ensure the stability of the subsequent evaporation process.
• MVR forced circulation evaporation: The pre-treated wastewater enters the MVR forced circulation tubular evaporation system.
• Heating evaporation: Through mechanical steam recompression technology, the secondary steam is compressed and heated, and then recycled as a heat source. The wastewater is heated and evaporated in the
evaporator, and sodium chloride gradually concentrates to a saturated state and crystallizes out.
• Forced circulation: The material circulates and exchanges heat within the evaporator through the action of a forced circulation pump, ensuring uniform heating of the material liquid and preventing local overheating or scaling issues.
• Utilization of secondary steam: The secondary steam generated during the evaporation process is compressed by a compressor, its temperature and pressure are increased, and then it is reused as a heat source, achieving high efficiency and energy conservation.
Crystallization and separation: After crystallization, sodium chloride is separated by centrifugation or filtration to obtain high-purity sodium chloride crystals, which can be recycled as industrial salt.
• Condensation and recovery: The condensate water generated during the evaporation process is treated and reused in production, achieving the recycling of water resources and reducing wastewater discharge.
Technical advantage
• High efficiency and energy conservation: MVR technology significantly reduces energy consumption through the recompression and recycling of secondary steam. Compared with traditional single-effect evaporation processes, its energy-saving effect can reach 60% to 80%.
• Forced circulation design: Through the action of the forced circulation pump, it ensures that the material liquid is uniformly heated in the evaporator, avoiding local overheating or scaling problems, and improving the operational efficiency and stability of the equipment.
• Strong corrosion resistance: The main body is made of TA2 titanium alloy, which has excellent corrosion resistance and can effectively resist the corrosion of sodium chloride wastewater, thus extending the service life of the equipment.
• High degree of automation: Equipped with an advanced automatic control system, it realizes full-process automatic monitoring and operation, ensuring the stability of the production process and the consistency of product quality.
• Significant environmental benefits: By condensing and recovering secondary steam, wastewater discharge is reduced, meeting environmental protection requirements.
Application field
The MVR forced circulation tubular evaporation system is widely used in fields such as chemical engineering, pharmaceuticals, and environmental protection, and is particularly suitable for the treatment of high-salt wastewater and resource recovery.
Jinkebotong Environmental Protection Technology (Jiangsu) Co., Ltd
